Kievan Rus' begins with the rule (882–912) of Prince Oleg, who extended his control from Novgorod south along the Dnieper river valley in order to protect trade from Khazar incursions from the east[3] and moved his capital to the more strategic Kiev. Sviatoslav I (died 972) achieved the first major expansion of Kievan Rus' territorial control, fighting a war of conquest against the Khazar Empire. Vladimir the Great (980–1015) introduced Christianity with his own baptism and, by decree, that of all the inhabitants of Kiev and beyond. Kievan Rus' reached its greatest extent under Yaroslav I (1019–1054); his sons assembled and issued its first written legal code, the Rus' Justice, shortly after his death.[8]

The state declined beginning in the late 11th century and during the 12th century, disintegrating into various rival regional powers.[9] It was further weakened by economic factors such as the collapse of Rus' commercial ties to Byzantium due to the decline of Constantinople[10] and the accompanying diminution of trade routes through its territory. The state finally fell to the Mongol invasion of the 1240s.

During its existence, Kievan Rus' was known as the "land of the Rus'" (Old East Slavic: Рѹ́сьскаѧ землѧ, from the ethnonym Рѹ́сь; Greek: Ῥώς; Arabic: الروس ar-Rus), in Greek as Ῥωσία, in Old French as Russie, Rossie, in Latin as Russia (with local German spelling variants Ruscia and Ruzzia), and later also as pseudo-antique Ruthenia.[1][11] Various etymologies have been proposed, including Ruotsi, the Finnish designation for Sweden, and Ros, a tribe from the middle Dnieper valley region.[12]

The term "Kievan Rus'" (Ки́евская Русь Kievskaya Rus’) was coined in the 19th century in Russian historiography to refer to the period when the center was in Kiev.[13] In English, the term was introduced in the early 20th century, when it was found in the 1913 English translation of Vasily Klyuchevsky's A History of Russia,[14] to distinguish the early polity from successor states, which were also named Rus. Later, the Russian term was rendered into Belarusian and Ukrainian as Кіеўская Русь Kijeŭskaja Rus’ and Ки́ївська Русь Kyivs'ka Rus’, respectively.

Controversy persists over whether the Rus’ were Varangians (Vikings) or Slavs. This uncertainty is due largely to a paucity of contemporary sources. Attempts to address this question instead rely on archaeological evidence, the accounts of foreign observers, legends and literature from centuries later.[18] To some extent the controversy is related to the foundation myths of modern states in the region.[19] According to the "Normanist" view, the Rus' were Scandinavians, while Russian and Ukrainian nationalist historians generally argue that the Rus' were themselves Slavs.[20][21][22] Normanist theories focus on the earliest written source for the East Slavs, the Russian Primary Chronicle,[23] although even this account was not produced until the 12th century.[24] Nationalist accounts have suggested that the Rus' were present before the arrival of the Varangians,[25] noting that only a handful of Scandinavian words can be found in modern Russian and that Scandinavian names in the early chronicles were soon replaced by Slavic names.[26] Nevertheless, archaeological evidence from the area suggests that a Scandinavian population was present during the 10th century at the latest.[27] On balance, it seems likely that the Rus' proper were a small minority of Scandinavians who formed an elite ruling class, while the great majority of their subjects were Slavs.[26] Considering the linguistic arguments mounted by nationalist scholars, if the proto-Rus' were Scandinavians, they must have quickly become nativized, adopting Slavic languages and other cultural practices.

Ahmad ibn Fadlan, an Arab traveler during the 10th century, provided one of the earliest written descriptions of the Rus': "They are as tall as a date palm, blond and ruddy, so that they do not need to wear a tunic nor a cloak; rather the men among them wear garments that only cover half of his body and leaves one of his hands free."[28]Liutprand of Cremona, who was twice an envoy to the Byzantine court (949 and 968), identifies the "Russi" with the Norse ("the Russi, whom we call Norsemen by another name")[29] but explains the name as a Greek term referring to their physical traits ("A certain people made up of a part of the Norse, whom the Greeks call [...] the Russi on account of their physical features, we designate as Norsemen because of the location of their origin.").[30]Leo the Deacon, a 10th-century Byzantine historian and chronicler, refers to the Rus' as "Scythians" and notes that they tended to adopt Greek rituals and customs.[31]

According to the Primary Chronicle, the territories of the East Slavs in the 9th century were divided between the Varangians and the Khazars.[32] The Varangians are first mentioned imposing tribute from Slavic and Finnic tribes in 859.[33] In 862, the Finnic and Slavic tribes in the area of Novgorod rebelled against the Varangians, driving them "back beyond the sea and, refusing them further tribute, set out to govern themselves." The tribes had no laws, however, and soon began to make war with one another, prompting them to invite the Varangians back to rule them and bring peace to the region:

They said to themselves, "Let us seek a prince who may rule over us, and judge us according to the Law." They accordingly went overseas to the Varangian Rus'. … The Chuds, the Slavs, the Krivichs and the Ves then said to the Rus', "Our land is great and rich, but there is no order in it. Come to rule and reign over us". They thus selected three brothers with their kinfolk, who took with them all the Rus' and migrated.

The three brothers—Rurik, Sineus, and Truvor—established themselves in Novgorod, Beloozero, and Izborsk, respectively.[35] Two of the brothers died, and Rurik became the sole ruler of the territory and progenitor of the Rurik Dynasty.[36] A short time later, two of Rurik’s men, Askold and Dir, asked him for permission to go to Tsargrad (Constantinople). On their way south, they discovered "a small city on a hill," Kiev, captured it and the surrounding country from the Khazars, populated the region with more Varangians, and "established their dominion over the country of the Polyanians."[37][38]

The Chronicle reports that Askold and Dir continued to Constantinople with a navy to attack the city in 863–66, catching the Byzantines by surprise and ravaging the surrounding area,[38] though other accounts date the attack in 860.[39]Patriarch Photius vividly describes the "universal" devastation of the suburbs and nearby islands,[40] and another account further details the destruction and slaughter of the invasion.[41] The Rus' turned back before attacking the city itself, due either to a storm dispersing their boats, the return of the Emperor, or in a later account, due to a miracle after a ceremonial appeal by the Patriarch and the Emperor to the Virgin.[42] The attack was the first encounter between the Rus' and Byzantines and led the Patriarch to send missionaries north to engage and attempt to convert the Rus' and the Slavs.[43][44]

Rurik led the Rus' until his death in about 879, bequeathing his kingdom to his kinsman, Prince Oleg, as regent for his young son, Igor.[38][45] In 880-82, Oleg led a military force south along the Dnieper river, capturing Smolensk and Lyubech before reaching Kiev, where he deposed and killed Askold and Dir, proclaimed himself prince, and declared Kiev the "mother of Rus' cities."[46][47] Oleg set about consolidating his power over the surrounding region and the riverways north to Novgorod, imposing tribute on the East Slav tribes.[37][48] In 883, he conquered the Drevlians, imposing a fur tribute on them. By 885 he had subjugated the Poliane, Severiane, Vyatichi, and Radimichs, forbidding them to pay further tribute to the Khazars. Oleg continued to develop and expand a network of Rus' forts in Slav lands, begun by Rurik in the north.[49]

The new Kievan state prospered due to its abundant supply of furs, beeswax, honey, and slaves for export,[50] and because it controlled three main trade routes of Eastern Europe. In the north, Novgorod served as a commercial link between the Baltic Sea and the Volga trade route to the lands of the Volga Bulgars, the Khazars, and across the Caspian Sea as far as Baghdad, providing access to markets and products from Central Asia and the Middle East.[51][52] Trade from the Baltic also moved south on a network of rivers and short portages along the Dnieper known as the "route from the Varangians to the Greeks," continuing to the Black Sea and on to Constantinople. Kiev was a central outpost along the Dnieper route and a hub with the east-west overland trade route between the Khazars and the Germanic lands of Central Europe.[53] These commercial connections enriched Rus' merchants and princes, funding military forces and the construction of churches, palaces, fortifications, and further towns.[52] Demand for luxury goods fostered production of expensive jewelry and religious wares, allowing their export, and an advanced credit and money-lending system may have also been in place.[50]

The rapid expansion of the Rus' to the south led to conflict and volatile relationships with the Khazars and other neighbors on the Pontic steppe.[54][55][56] The Khazars dominated the Black Sea steppe during the 8th century,[57] trading and frequently allying with the Byzantine Empire against Persians and Arabs. In the late 8th century, the collapse of the Göktürk Khaganate led the Magyars and the Pechenegs, Ugric and Turkic peoples from Central Asia, to migrate west into the steppe region,[58] leading to military conflict, disruption of trade, and instability within the Khazar Khaganate.[59] The Rus' and Slavs had earlier allied with the Khazars against Arab raids on the Caucasus, but they increasingly worked against them to secure control of the trade routes.[60]

The Byzantine Empire was able to take advantage of the turmoil to expand its political influence and commercial relationships, first with the Khazars and later with the Rus' and other steppe groups.[54] The Byzantines established the Theme of Cherson, formally known as Klimata, in the Crimea in the 830s to defend against raids by the Rus' and to protect vital grain shipments supplying Constantinople.[61] Cherson also served as a key diplomatic link with the Khazars and others on the steppe, and it became the center of Black Sea commerce.[62] The Byzantines also helped the Khazars build a fortress at Sarkel on the Don river to protect their northwest frontier against incursions by the Turkic migrants and the Rus', and to control caravan trade routes and the portage between the Don and Volga rivers.[63]

The expansion of the Rus' put further military and economic pressure on the Khazars, depriving them of territory, tributaries, and trade.[64] In around 890, Oleg waged an indecisive war in the lands of the lower Dniester and Dnieper rivers with the Tivertsi and the Ulichs, who were likely acting as vassals of the Magyars, blocking Rus' access to the Black Sea.[65][66] In 894, the Magyars and Pechenegs were drawn into the wars between the Byzantines and the Bulgarian Empire. The Byzantines arranged for the Magyars to attack Bulgarian territory from the north, and Bulgaria in turn persuaded the Pechenegs to attack the Magyars from their rear. Boxed in, the Magyars were forced to migrate further west across the Carpathian mountains into the Hungarian plain, depriving the Khazars of an important ally and a buffer from the Rus'.[67][68] The migration of the Magyars allowed Rus' access to the Black Sea,[69] and they soon launched excursions into Khazar territory along the sea coast, up the Don river, and into the lower Volga region. The Rus' were raiding and plundering into the Caspian Sea region by 913, when they raided Baku and penetrated into the Caucasus.[70]

As the 10th century progressed, the Khazars were no longer able to command tribute from the Volga Bulgars, and their relationship with the Byzantines deteriorated, as Byzantium increasingly allied with the Pechenegs against them.[71] The Pechenegs were thus secure to raid the lands of the Khazars from their base between the Volga and Don rivers, allowing them to expand to the west.[55] Rus' relations with the Pechenegs were complex, as the groups alternately formed alliances with and against one another. The Pechenegs were nomads roaming the steppe raising livestock which they traded with the Rus' for agricultural goods and other products.[72] The lucrative Rus' trade with the Byzantine Empire had to pass through Pecheneg-controlled territory, so the need for generally peaceful relations was essential. Nevertheless, while the Primary Chronicle reports the Pechenegs entering Rus' territory in 915 and then making peace, they were waging war with one another again in 920.[73][74] Pechenegs are reported assisting the Rus' in later campaigns against the Byzantines, yet allied with the Byzantines against the Rus' at other times.[75]

After the Rus' attack on Constantinople in 860, the Byzantine Patriarch Photius sent missionaries north to convert the Rus' and the Slavs. Prince Rastislav of Moravia had requested the Emperor to provide teachers to interpret the holy scriptures, so in 863 the brothers Cyril and Methodius were sent as missionaries, due to their knowledge of the Slavonic language.[44][76][77] The Slavs had no written language, so the brothers devised the Glagolitic alphabet, later developed into Cyrillic, and standardized the language of the Slavs, later known as Old Church Slavonic. They translated portions of the Bible and drafted the first Slavic civil code and other documents, and the language and texts spread throughout Slavic territories, including Kievan Rus’. The mission of Cyril and Methodius served both evangelical and diplomatic purposes, spreading Byzantine cultural influence in support of imperial foreign policy.[78] In 867 the Patriarch announced that the Rus' had accepted a bishop, and in 874 he speaks of an "Archbishop of the Rus'."[43]

Relations between the Rus' and Byzantines became more complex after Oleg took control over Kiev, reflecting commercial, cultural, and military concerns.[79] The wealth and income of the Rus' depended heavily upon trade with Byzantium. Constantine Porphyrogenitus described the annual course of the princes of Kiev, collecting tribute from client tribes, assembling the product into a flotilla of hundreds of boats, conducting them down the Dnieper to the Black Sea, and sailing to the estuary of the Dniester, the Danube delta, and on to Constantinople.[72][80] On their return trip they would carry silk fabrics, spices, wine, and fruit. The importance of this trade relationship led to military action when disputes arose. The Primary Chronicle reports that the Rus' attacked Constantinople again in 907, probably to secure trade access. The Chronicle glorifies the military prowess and shrewdness of Oleg, an account imbued with legendary detail.[43][81] Byzantine sources do not mention the attack, but a pair of treaties in 907 and 911 set forth a trade agreement with the Rus',[73][82] the terms suggesting pressure on the Byzantines, who granted the Rus' quarters and supplies for their merchants and tax-free trading privileges in Constantinople.[43][83]

The Chronicle provides a mythic tale of Oleg's death. A sorcerer prophesies that the death of the Grand Prince would be associated with a certain horse. Oleg has the horse sequestered, and it later dies. Oleg goes to visit the horse and stands over the carcass, gloating that he had outlived the threat, when a snake strikes him from among the bones, and he soon becomes ill and dies.[84][85] The Chronicle reports that Prince Igor succeeded Oleg in 913, and after some brief conflicts with the Drevlians and the Pechenegs, a period of peace ensued for over twenty years.

In 941, Igor led another major Rus' attack on Constantinople, probably over trading rights again.[43][86] A navy of 10,000 vessels, including Pecheneg allies, landed on the Bithynian coast and devastated the Asiatic shore of the Bosphorus.[87] The attack was well-timed, perhaps due to intelligence, as the Byzantine fleet was occupied with the Arabs in the Mediterranean, and the bulk of its army was stationed in the east. The Rus’ burned towns, churches, and monasteries, butchering the people and amassing booty. The emperor arranged for a small group of retired ships to be outfitted with Greek fire throwers and sent them out to meet the Rus’, luring them into surrounding the contingent before unleashing the Greek fire.[88]Liutprand of Cremona wrote that "the Rus', seeing the flames, jumped overboard, preferring water to fire. Some sank, weighed down by the weight of their breastplates and helmets; others caught fire." Those captured were beheaded. The ploy dispelled the Rus’ fleet, but their attacks continued into the hinterland as far as Nicomedia, with many atrocities reported as victims were crucified and set up for use as targets. At last a Byzantine army arrived from the Balkans to drive the Rus' back, and a naval contingent reportedly destroyed much of the Rus' fleet on its return voyage (possibly an exaggeration since the Rus' soon mounted another attack). The outcome indicates increased military might by Byzantium since 911, suggesting a shift in the balance of power.[87]

Igor returned to Kiev keen for revenge. He assembled a large force of warriors from among neighboring Slavs and Pecheneg allies, and sent for reinforcements of Varangians from “beyond the sea.”[88][89] In 944 the Rus' force advanced again on the Greeks, by land and sea, and a Byzantine force from Cherson responded. The Emperor sent gifts and offered tribute in lieu of war, and the Rus' accepted. Envoys were sent between the Rus’, the Byzantines, and the Bulgarians in 945, and a peace treaty was completed. The agreement again focused on trade, but this time with terms less favorable to the Rus’, including stringent regulations on the conduct of Rus’ merchants in Cherson and Constantinople and specific punishments for violations of the law.[90] The Byzantines may have been motivated to enter the treaty out of concern of a prolonged alliance of the Rus', Pechenegs, and Bulgarians against them,[91] though the more favorable terms further suggest a shift in power.[87]

Following the death of Grand Prince Igor in 945, his wife Olga ruled as regent in Kiev until their son Sviatoslav reached maturity (ca. 963).[92] His decade-long reign over Rus' was marked by rapid expansion through the conquest of the Khazars of the Pontic steppe and the invasion of the Balkans. By the end of his short life, Sviatoslav carved out for himself the largest state in Europe, eventually moving his capital from Kiev to Pereyaslavets on the Danube in 969. In contrast with his mother's conversion to Christianity, Sviatoslav, like his druzhina, remained a staunch pagan. Due to his abrupt death in an ambush in 972, Sviatoslav's conquests, for the most part, were not consolidated into a functioning empire, while his failure to establish a stable succession led to a fratricidal feud among his sons, resulted in two of his three sons being killed.

It is not clearly documented when the title of the Grand Duke was first introduced, but the importance of the Kiev principality was recognized after the death of Sviatoslav I in 972 and the ensuing struggle between Vladimir the Great and Yaropolk I. The region of Kiev dominated the state of Kievan Rus' for the next two centuries. The Grand Prince (velikiy kniaz') of Kiev controlled the lands around the city, and his formally subordinate relatives ruled the other cities and paid him tribute. The zenith of the state's power came during the reigns of Vladimir the Great (980–1015) and Prince Yaroslav I the Wise (1019–1054). Both rulers continued the steady expansion of Kievan Rus' that had begun under Oleg.

Vladimir had been prince of Novgorod when his father Sviatoslav I died in 972. He was forced to flee to Scandinavia in 976 after his half-brother Yaropolk had murdered his other brother Oleg and taken control of Rus. In Scandinavia, with the help of his relative EarlHåkon Sigurdsson, ruler of Norway, Vladimir assembled a viking army and reconquered Novgorod and Kiev from Yaropolk.[93] As Prince of Kiev, Vladimir's most notable achievement was the Christianization of Kievan Rus', a process that began in 988. The Primary Chronicle states that when Vladimir had decided to accept a new faith instead of the traditional idol-worship (paganism) of the Slavs, he sent out some of his most valued advisors and warriors as emissaries to different parts of Europe. They visited the Christians of the Latin Rite, the Jews, and the Muslims before finally arriving in Constantinople. They rejected Islam because, among other things, it prohibited the consumption of alcohol, and Judaism because the god of the Jews had permitted his chosen people to be deprived of their country. They found the ceremonies in the Roman church to be dull. But at Constantinople, they were so astounded by the beauty of the cathedral of Hagia Sophia and the liturgical service held there that they made up their minds there and then about the faith they would like to follow. Upon their arrival home, they convinced Vladimir that the faith of the Byzantine Rite was the best choice of all, upon which Vladimir made a journey to Constantinople and arranged to marry Princess Anna, the sister of Byzantine emperor Basil II.[94]

Vladimir's choice of Eastern Christianity may also have reflected his close personal ties with Constantinople, which dominated the Black Sea and hence trade on Kiev's most vital commercial route, the Dnieper River. Adherence to the Eastern Church had long-range political, cultural, and religious consequences. The church had a liturgy written in Cyrillic and a corpus of translations from Greek that had been produced for the Slavic peoples. This literature facilitated the conversion to Christianity of the Eastern Slavs and introduced them to rudimentary Greek philosophy, science, and historiography without the necessity of learning Greek (there were some merchants who did business with Greeks and likely had an understanding of contemporary business Greek).[95] In contrast, educated people in medieval Western and Central Europe learned Latin. Enjoying independence from the Roman authority and free from tenets of Latin learning, the East Slavs developed their own literature and fine arts, quite distinct from those of other Eastern Orthodox countries.[citation needed] (See Old East Slavic language and Architecture of Kievan Rus for details ). Following the Great Schism of 1054, the Rus' church maintained communion with both Rome and Constantinople for some time, but along with most of the Eastern churches it eventually split to follow the Eastern Orthodox. That being said, unlike other parts of the Greek world, Kievan Rus' did not have a strong hostility to the Western world.[96]

Yaroslav, known as "the Wise", struggled for power with his brothers. A son of Vladimir the Great, he was vice-regent of Novgorod at the time of his father's death in 1015. Subsequently, his eldest surviving brother, Svyatopolk the Accursed, killed three of his other brothers and seized power in Kiev. Yaroslav, with the active support of the Novgorodians and the help of Viking mercenaries, defeated Svyatopolk and became the grand prince of Kiev in 1019.[97] Although he first established his rule over Kiev in 1019, he did not have uncontested rule of all of Kievan Rus' until 1036. Like Vladimir, Yaroslav was eager to improve relations with the rest of Europe, especially the Byzantine Empire. Yaroslav's granddaughter, Eupraxia the daughter of his son Vsevolod I, Prince of Kiev, was married to Henry III, Holy Roman Emperor. Yaroslav also arranged marriages for his sister and three daughters to the kings of Poland, France, Hungary and Norway. Yaroslav promulgated the first East Slavic law code, Russkaya Pravda; built Saint Sophia Cathedral in Kiev and Saint Sophia Cathedral in Novgorod; patronized local clergy and monasticism; and is said to have founded a school system. Yaroslav's sons developed the great Kiev Pechersk Lavra (monastery), which functioned in Kievan Rus' as an ecclesiastical academy.

In the centuries that followed the state's foundation, Rurik's descendants shared power over Kievan Rus'. Princely succession moved from elder to younger brother and from uncle to nephew, as well as from father to son. Junior members of the dynasty usually began their official careers as rulers of a minor district, progressed to more lucrative principalities, and then competed for the coveted throne of Kiev.

The gradual disintegration of the Kievan Rus' began in the 11th century, after the death of Yaroslav the Wise. The position of the Grand Prince of Kiev was weakened by the growing influence of regional clans.

The most prominent struggle for power was the conflict that erupted after the death of Yaroslav the Wise. The rivaling Principality of Polotsk was contesting the power of the Grand Prince by occupying Novgorod, while Rostislav Vladimirovich was fighting for the Black Sea port of Tmutarakan belonging to Chernihiv.[citation needed] Three of Yaroslav's sons that first allied together found themselves fighting each other especially after their defeat to the Cuman forces in 1068 at the Battle of the Alta River. At the same time an uprising took place in Kiev, bringing to power Vseslav of Polotsk who supported the traditional Slavic paganism.[citation needed] The ruling Grand Prince Iziaslav fled to Poland asking for support and in couple of years returned to establish the order.[citation needed] The affairs became even more complicated by the end of the 11th century driving the state into chaos and constant warfare. On the initiative of Vladimir II Monomakh in 1097 the first federal council of Kievan Rus took place near Chernihiv in the city of Liubech with the main intention to find an understanding among the fighting sides. However even though that did not really stop the fighting, it certainly cooled things off.[citation needed]

The last ruler to maintain united state was Mstislav the Great. After his death in 1132 the Kievan Rus' fell into recession and a rapid decline, and Mstislav's successor Yaropolk II of Kiev instead of focussing on the external threat of the Cumans was embroiled in conflicts with the growing power of the Novgorod Republic. In 1169, as the Kievan Rus' state was full of internal conflict, Andrei Bogolyubsky of Vladimir sacked the city of Kiev. The sack of the city fundamentally changed the perception of Kiev and was evidence of the fragmentation of the Kievan Rus'.[98] By the end of the 12th century, the Kievan state became even further fragmented and had been divided into roughly twelve different principalities.[99]

The Crusades brought a shift in European trade routes that accelerated the decline of Kievan Rus'. In 1204 the forces of the Fourth Crusade sacked Constantinople, making the Dnieper trade route marginal.[10] At the same time the Teutonic Knights (of the Northern Crusades) were conquering the Baltic region and threatening the Lands of Novgorod. Concurrently with it the Ruthenian Federation of Kievan Rus' started to disintegrate into smaller principalities as the Rurik dynasty grew. The local Orthodox Christianity of Kievan Rus', while struggling to establish itself in the predominantly pagan state and losing its main base in Constantinople was on the brink of extinction. Some of the main regional centers that later have developed were Novgorod, Chernigov, Galich, Kiev, Ryazan, Vladimir-upon-Klyazma, Vladimir of Volyn, Polotsk, and others.

The Nativity, a Kievan (possibly Galician) illumination from the Gertrude Psalter.

In the north, the Republic of Novgorod prospered because it controlled trade routes from the River Volga to the Baltic Sea. As Kievan Rus' declined, Novgorod became more independent. A local oligarchy ruled Novgorod; major government decisions were made by a town assembly, which also elected a prince as the city's military leader. In the 12th century, Novgorod acquired its own archbishopIlya in 1169, a sign of increased importance and political independence, while about 30 years prior to that in 1136 in Novgorod was established a republican form of government - elective monarchy. Since then Novgorod enjoyed a wide degree of autonomy although being closely associated with the Kievan Rus.

In the northeast, Slavs from the Kievan region colonized the territory that later would become the Grand Duchy of Moscow by subjugating and merging with the Finnic tribes already occupying the area. The city of Rostov, the oldest centre of the northeast, was supplanted first by Suzdal and then by the city of Vladimir, which become the capital of Vladimir-Suzdal'. The combined principality of Vladimir-Suzdal asserted itself as a major power in Kievan Rus' in the late 12th century. In 1169 Prince Andrey Bogolyubskiy of Vladimir-Suzdal sacked the city of Kiev and took over the title of the (Великий Князь/Velikiy Knyaz/Grand Prince or Grand Duke) to Vladimir, this way claiming the primacy in Rus'. Prince Andrey then installed his younger brother, who ruled briefly in Kiev while Andrey continued to rule his realm from Suzdal. In 1299, in the wake of the Mongol invasion, the metropolitan moved from Kiev to the city of Vladimir and Vladimir-Suzdal.

To the southwest, the principality of Halych had developed trade relations with its Polish, Hungarian and Lithuanian neighbours and emerged as the local successor to Kievan Rus'. In 1199, Prince Roman Mstislavich united the two previously separate principalities. In 1202 he conquered Kiev, and assumed the title of Grand Duke of Kievan Rus', which was held by the rulers of Vladimir-Suzdal since 1169. His son, Prince Daniil (r. 1238–1264) looked for support from the West. He accepted a crown as a "Rex Rusiae" ("King of Russia") from the Roman papacy, apparently doing so without breaking with Constantinople. In 1370, the patriarch of the Eastern Orthodox Church in Constantinople granted the King of Poland a metropolitan for his Russian subjects. Lithuanian rulers also requested and received a metropolitan for Novagrudok shortly afterwards. Cyprian, a candidate pushed by the Lithuanian rulers, became Metropolitan of Kiev in 1375 and metropolitan of Moscow in 1382; this way the church in the Russian countries was reunited for some time. In 1439, Kiev became the seat of a separate "Metropolitan of Kiev, Galich and all Rus'" for all Greek Orthodox Christians under Polish-Lithuanian rule.

However, a long and unsuccessful struggle against the Mongols combined with internal opposition to the prince and foreign intervention weakened Galicia-Volhynia. With the end of the Mstislavich branch of the Rurikids in the mid-14th century, Galicia-Volhynia ceased to exist; Poland conquered Galich; Lithuania took Volhynia, including Kiev, conquered by Gediminas in 1321 ending the rule of Rurikids in the city. Lithuanian rulers then assumed the title over Ruthenia.

The state finally disintegrated under the pressure of the Mongol invasion of Rus', fragmenting it into successor principalities who paid tribute to the Golden Horde (the so-called Tatar Yoke). In the late 15th century the Muscovite Grand Dukes began taking over former Kievan territories and proclaimed themselves the sole legal successors of the Kievan principality according to the protocols of the medieval theory of translatio imperii.

On the western periphery, Kievan Rus' was succeeded by the Principality of Galicia-Volhynia. Later, as these territories, now part of modern central Ukraine and Belarus, fell to the Gediminids, the powerful, largely Ruthenized Grand Duchy of Lithuania drew heavily on Rus' cultural and legal traditions. Due to the fact of the economic and cultural core of Rus' being located on the territory of modern Ukraine,Ukrainian historians and scholars consider Kievan Rus' to be a founding Ukrainian state.[5]

On the north-eastern periphery of Kievan Rus', traditions were adapted in the Vladimir-Suzdal Principality that gradually gravitated towards Moscow. To the very north, the Novgorod and Pskov Feudal Republics were less autocratic than Vladimir- Suzdal- Moscow until they were absorbed by the Grand Duchy of Moscow. Russian historians consider Kievan Rus "the first period of Russian history."

During the Kievan era, the peoples of Rus' experienced a period of great economic expansion, opening trade routes with the Vikings to the north and west and the Byzantine Greeks to the south and west; traders also began to travel south and east eventually making contact with Persia and the peoples of Central Asia.

Due to the expansion of trade and its geographical proximity, Kiev became the most important trade center and chief among the communes; therefore the leader of Kiev gained political "control" over the surrounding areas. This princedom emerged from a coalition of traditional patriarchic family communes banded together in an effort to increase the applicable workforce and expand the productivity of the land. This union developed the first major cities in the Rus' and was the first notable form of self-government. As these communes became larger, the emphasis was taken off the family holdings and placed on the territory that surrounded. This shift in ideology became known as the verv'.

In the 11th century and the 12th century, the princes and their retinues, which were a mixture of Slavic and Scandinavian elites, dominated the society of Kievan Rus'. Leading soldiers and officials received income and land from the princes in return for their political and military services. Kievan society lacked the class institutions and autonomous towns that were typical of Western European feudalism. Nevertheless, urban merchants, artisans and labourers sometimes exercised political influence through a city assembly, the veche (council), which included all the adult males in the population. In some cases, the veche either made agreements with their rulers or expelled them and invited others to take their place. At the bottom of society was a stratum of slaves. More important was a class of tribute-paying peasants, who owed labour duty to the princes. The widespread personal serfdom characteristic of Western Europe did not exist in Kievan Rus'.

The change in political structure led to the inevitable development of the peasant class or smerdy. The smerdy were free un-landed people that found work by laboring for wages on the manors which began to develop around 1031 as the verv' began to dominate socio-political structure. The smerdy were initially given equality in the Kievian law code, they were theoretically equal to the prince, so they enjoyed as much freedom as can be expected of manual laborers. However in the 13th century they began to slowly lose their rights and became less equal in the eyes of the law.

The economic development of Kievan Rus may be translated into demographic statistics. Around 1200, Kiev had a population of 50,000, Novgorod and Chernigov both had around 30,000.[109]Constantinople had population of about 400,000 around 1180.[110] The Soviet scholar Mikhail Tikhomirov calculated that Kievan Rus' on the eve of the Mongol invasion had around 300 urban centers.[111]

Kievan Rus' also played an important genealogical role in European politics. Yaroslav the Wise, whose stepmother belonged to the greatest dynasty to rule Byzantium, married the only legitimate daughter of the king who Christianized Sweden. His daughters became queens of Hungary, France and Norway, his sons married the daughters of a Polish king and a Byzantine emperor (not to mention a niece of the Pope), while his granddaughters were a German Empress and (according to one theory) the queen of Scotland. A grandson married the only daughter of the last Anglo-Saxon king of England. Thus the Rurikids were a well-connected royal family of the time.[112][113]

From the 9th century, the Pecheneg nomads began an uneasy relationship with Kievan Rus′. For over two centuries they launched random raids into the lands of Rus′, which sometimes escalated into full-scale wars (such as the 920 war on the Pechenegs by Igor of Kiev reported in the Primary Chronicle), but there were also temporary military alliances (e.g. the 943 Byzantine campaign by Igor).[114] In 968, the Pechenegs attacked and besieged the city of Kiev.[115] Some speculation exists that the Pechenegs drove off the Tivertsi and the Ulichs to the regions of the upper Dniester river in Bukovina. The Byzantine Empire was known to support the Pechenegs in their military campaigns against the Eastern Slavic states.[citation needed]

"They [the Mongols] attacked Rus, where they made great havoc, destroying cities and fortresses and slaughtering men; and they laid siege to Kiev, the capital of Rus; after they had besieged the city for a long time, they took it and put the inhabitants to death. When we were journeying through that land we came across countless skulls and bones of dead men lying about on the ground. Kiev had been a very large and thickly populated town, but now it has been reduced almost to nothing, for there are at the present time scarce two hundred houses there and the inhabitants are kept in complete slavery"[117]

Byzantium quickly became the main trading and cultural partner for Kiev, but relations were not always friendly. The most serious conflict between the two powers was the war of 968–971 in Bulgaria, but several Rus' raiding expeditions against the Byzantine cities of the Black Sea coast and Constantinople itself are also recorded. Although most were repulsed, they were concluded by trade treaties that were generally favourable to the Rus'.

Rus'-Byzantine relations became closer following the marriage of the porphyrogenitaAnna to Vladimir the Great, and the subsequent Christianization of the Rus': Byzantine priests, architects and artists were invited to work on numerous cathedrals and churches around Rus', expanding Byzantine cultural influence even further. Numerous Rus' served in the Byzantine army as mercenaries, most notably as the famous Varangian Guard.

In 988 the Christian Church in Rus' territorially fell under the jurisdiction of the Ecumenical Patriarchate of Constantinople after it was officially adopted as the state religion. According to several chronicles after that date the predominant cult of Slavic paganism was persecuted.

The exact date of creation of the Kiev Metropolis is uncertain, as well as who was the first leader of the church. Predominantly it is considered that the first head was Michael I of Kiev, however some sources also claim Leontiy who is often placed after Michael or Anastas Chersonesos, became the first bishop of the Church of the Tithes. The first metropolitan to be confirmed by historical sources is Theopemp, who was appointed by Patriarch Alexius of Constantinople in 1038. Before 1015 there were five dioceses: Kiev, Chernihiv, Bilhorod, Volodymyr, Novgorod, and soon thereafter Yuriy-upon-Ros. The Kiev Metropolitan sent his own delegation to the Council of Bari in 1089.

^The Life of St. George of Amastris describes the Rus' as a barbaric people "who are brutal and crude and bear no remnant of love for humankind." David Jenkins, The Life of St. George of Amastris (University of Notre Dame Press, 2001), p.18.

^Normanist scholars accept this moment as the foundation of the Kievan Rus' state, while anti-Normanists point to other Chronicle entries to argue that the East Slav Polianes were already in the process of forming a state independently. Martin (2009), pp.37-40.

^The Khazar khagan initially granted the Rus' safe passage in exchange for a share of the booty but attacked them on their return voyage, killing most of the raiders and seizing their haul. Vernadsky (1976), pp.32–33.

^Sherman, Charles Phineas (1917). "Russia". Roman Law in the Modern World. Boston: The Boston Book Company,. p. 191. The adoption of Christianity by Vladimir... was followed by commerce with the Byzantine Empire. In its wake came Byzantine art and culture. And in the course of the next century what is now Southeastern Russia became more advanced in civilization than any western European State of the period, for Russia came in for a share of Byzantine culture, then vastly superior to the rudeness of Western nations.

^Vernadsky, George (1973). "Russian Civilization in the Kievan Period: Education". Kievan Russia. Yale University Press. p. 426. ISBN0-300-01647-6. It is to the credit of Vladimir and his advisors they built not only churches but schools as well. This compulsory baptism was followed by compulsory education... Schools were thus founded not only in Kiev but also in provincial cities. From the "Life of St. Feodosi" we know that a school existed in Kursk around the year of 1023. By the time of Yaroslav's reign (1019–54), education had struck roots and its benefits were apparent. Around 1030 Iaroslav founded a divinity school in Novgorod for three hundred children of both laymen and clergy to be instructed in "book-learning". As a general measure he made the parish priests to "teach the people."

^"The most notable aspect of the criminal provisions was that punishments took the form of seizure of property, banishment, or, more often, payment of a fine. Even murder and other severe crimes (arson, organised horse thieving, and robbery) were settled by monetary fines. Although the death penalty had been introduced by Vladimir the Great, it too was soon replaced by fines." Magocsi, Paul Robert (1996). A History of Ukraine, p. 90, Toronto: University of Toronto Press. ISBN 0-8020-0830-5.

^"In medieval Europe, a mark of a dynasty's prestige and power was the willingness with which other leading dynasties entered into matrimonial relations with it. Measured by this standard, Yaroslav's prestige must have been great indeed... . Little wonder that Iaroslav is often dubbed by historians as 'the father-in-law of Europe.'" -(Subtelny, Orest (1988). Ukraine: A History. Toronto: University of Toronto Press. p. 35. ISBN0-8020-5808-6.)

^"By means of these marital ties, Kievan Rus’ became well known throughout Europe." —Magocsi, Paul Robert (1996). A History of Ukraine, p. 76, Toronto: University of Toronto Press. ISBN 0-8020-0830-5.

Velychenko, Stephen, National history as cultural process : a survey of the interpretations of Ukraine's past in Polish, Russian, and Ukrainian historical writing from the earliest times to 1914" Edmonton,1992.